Pipe-trimming device



(No Model.)

G. T. FITZSIMMO-NS.

PIPE TRIMMING DEVIUE.

No. 403,828. Patented May 21 1889.

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UNITED STATES PATENT OFFICE.

GEORGE T. FITZSIMMONS, OF "WEST CHESTER, PENNSYLVANIA.

PIPE-TRIMMING DEVICE.

SPECIFICATION forming part of Letters Patent No. 403,828, dated May 21, 1889.

Application filed March 21, 1889.

To all whom it may concern.-

Be it known that I, GEORGE '1. FITzsIM- MoNs, a citizen of the United States, residing at West Chester, in the county of Chester and State of Pennsylvania, have invented new and useful Improvements in Pipe-Trimming Devices, of which the following is a specification.

My invention relates to devices for trimming the ends of pipes, to impart such form thereto as will enable separate portions to be joined together by soldering.

The invention has for its purpose the provision of a simple and convenient tool or device whereby the ends of service-pipes or other tubes may be readily and accurately cut or trimmed after being cut to length, to form a neat, uniform, and close joint, free from burrs or similar imperfections.

It is a purpose of my invention, also, to provide interchangeable guides adapted to fit the interior of pipes of different sizes, and support the ends of the same upon the mandrel of the tool during the operation of trimming, so constructed that they may readily be removed and applied, the guides or interior supports being looked upon the mandrel during the time the tool is in action to preventtheir dropping into the pipe.

The invention consists, to these ends, in the several novel features of construction and new combinations of parts, hereinafter fully set forth, and then definitely pointed out in the claims following this specification.

Referring to the accompanying drawings, Figure 1 is a central lon gitudinal section upon the line of the axis of the mandrel of the tool. Fig. 2 is an end elevation of the same parts. Fig. 3 is a detail view of the end of the mandrel, showing the locking devices. Fig. 4: is a similar View of the corresponding end of one of the interchangeable guides.

In the said drawings, the reference-numeral 1 denotes a strong spindle or mandrel having a cross-head, 2, at one end, which serves as a handle. Upon the body of the mandrel 1, between its ends, is rigidly mounted a conical shell, 3, through the apex of which the mandrel passes, lying in the axis of the cone and extending as far as its base, which isopen. In the wall of the said conical shell is formed a slot or opening, 4, in which lies the edge of Serial No. 304,143. (No model.)

a knife or cutting-tool; 5, which is adjustably mounted upon a bracket, 6, the knife being attached by screws 7, passing through slots 8 in its blade. The direction of the tool and bracket may be such as to give a shearing or drawing out to any object turned about the mandrel. The lower end of the mandrel, which latter is of any suitable diameter, is turned off, forming a tenon, 9, upon which is formed or mounted a segmental cam, 10, projecting laterally from the end of the tenon, and having its outer edge lying substantially in the circular plane of the outer face of the mandrel.

Upon the mandrel 1 is slipped a tubular guide, 12, its end lying against the apex of the conical shell. At its other end this guide is provided with a curved flange, 13, in which is formed an opening, 14, sufficient to permit the passage of the segmental cam 10, under which the flange passes as the guide is revolved on the mandrel. Upon one end of this flange is mounted a second cam, 15, so located that as the guide rotates on the mandrel and the flange 13 passes under the cam 10 the second cam, 15, will abut against the latter and prevent further rotation, while the curved flange, lying between the cam 10 and the shoulder 10" of the mandrel, will prevent withdrawal of the guide until it is turned far enough to compel the said cam 10 to register with the opening 14:.

The mode of operation is as follows: A guide having such size as to properly fit the interior of the end of the pipe is slipped upon the mandrel and turned until locked in the manner described. The operator then-inserts this guide in the end of the pipe until the latter abuts against the edge of the knife, whereupon the tool is revolved by the handle 2, beveling off the outer angle to any shape to which the cutter is adjusted. The operation is continued until the edge is completely trimmed, when the tool is removed. The guide gives support to the interior face and edge of the pipe and enables the knife to make a clean out without burring. When a different size of pipe is to be trimmed, the operation is precisely the same, the guide be ing first removed and another of proper diameter being attached.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s v 1. A tool for trimming pipes, having a revolving cutter set at a suitable angle, in combination with an interchangeable guide mounted on and locked with a central mandrel or axis, substantially as described.

2. A tool for trimming pipes, consisting of a conical shell having an adjustable cutter lying in a slot thereof and provided With a mandrel rigidly mounted in the axis of the cone, said guide having a curved flange interlocking with a groove or channel in the mandrel and provided With a cam abutting against a cam on said mandrel,substantially as described.

3. A tool for trimming pipes, consisting of a mandrel having a conical shell provided with a slot in which lies an adjustable cutter, said mandrel having a tenon provided with a laterally-projecting cam, a tubular guide on said mandrel having a curved flange provided with an opening permitting the cam on the mandrel to pass and the curved'flange to be turned beneath the said cam and the latter brought against a cam-stop on the curved flange, substantially as described.

4;. In a pipe-trimming tool, a mandrel, 1, having a handle, 2, and provided Witha rigid conical shell, 3, having a slot, 4, a knife, 5, mounted on a bracket, 6, on the shell and adjustable in said slot, a guide, 12, slipped on said mandrel and provided With a curved flange, 13, having an opening, 14, through which passes a cam, 10, on the reduced end of the mandrel, the guide being turned to GEORGE T. FI'TZSIMMONS.

Vitnesses:

HARMAN O. BOND, WM. P. MERCER. 

